1920020437 has 2 divisors, whose sum is σ = 1920020438. Its totient is φ = 1920020436.

The previous prime is 1920020413. The next prime is 1920020441. The reversal of 1920020437 is 7340200291.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1081686321 + 838334116 = 32889^2 + 28954^2 .

It is an emirp because it is prime and its reverse (7340200291) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1920020437 - 2¹¹ = 1920018389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1920020537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 960010218 + 960010219.

It is an arithmetic number, because the mean of its divisors is an integer number (960010219).

Almost surely, 2^1920020437 is an apocalyptic number.

It is an amenable number.

1920020437 is a deficient number, since it is larger than the sum of its proper divisors (1).

1920020437 is an equidigital number, since it uses as much as digits as its factorization.

1920020437 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 1920020437 is about 43818.0378040825. The cubic root of 1920020437 is about 1242.8974122625.

The spelling of 1920020437 in words is "one billion, nine hundred twenty million, twenty thousand, four hundred thirty-seven".